linux-kernel - Re: [RFC PATCH 0/4] Gang scheduling in CFS

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Message-ID: <20111219162808.GB10017@elte.hu>
Date:	Mon, 19 Dec 2011 17:28:09 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>
Cc:	peterz@...radead.org, linux-kernel@...r.kernel.org,
	vatsa@...ux.vnet.ibm.com, bharata@...ux.vnet.ibm.com
Subject: Re: [RFC PATCH 0/4] Gang scheduling in CFS


* Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com> wrote:

> On Mon, 19 Dec 2011 17:15:05 +0530, Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com> wrote:
> > > 
> > > What's behind this huge speedup? Does ebizzy use user-space 
> > > spinlocks perhaps? Could we do something on the user-space side 
> > > to get a similar speedup?
> > > 
> > Some more oprofile data here for the above ebizzy-2VM run:
> > 
> That is readprofile data, kernel booted with profile=2

Btw., you could try this newfangled tools/perf/ thing to profile 
the kernel ;-)

Thanks,

	Ingo
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